Java tutorial
/* * Copyright (C) 2013 YROM.NET * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package tv.acfun.a63.service; import java.nio.charset.Charset; import org.apache.commons.httpclient.Cookie; import tv.acfun.a63.AcApp; import tv.acfun.a63.BuildConfig; import tv.acfun.a63.MentionActivity; import tv.acfun.a63.MentionActivity.MentionsRequest; import tv.acfun.a63.R; import tv.acfun.a63.api.entity.Comment; import tv.acfun.a63.api.entity.Mentions; import tv.acfun.a63.util.Connectivity; import android.app.AlarmManager; import android.app.Notification; import android.app.NotificationManager; import android.app.PendingIntent; import android.app.Service; import android.content.BroadcastReceiver; import android.content.Context; import android.content.Intent; import android.content.IntentFilter; import android.os.IBinder; import android.os.SystemClock; import android.support.v4.app.NotificationCompat; import android.util.Log; import com.alibaba.fastjson.JSON; import com.alibaba.fastjson.JSONObject; import com.android.volley.Response.ErrorListener; import com.android.volley.Response.Listener; import com.android.volley.VolleyError; /** * @author Yrom * */ public class PushService extends Service { public static final String ACTION_REFRESH = "tv.acfun.action.REFRESH"; private NotificationManager mManager; private int lastTotalCount; private BroadcastReceiver receiver; @Override public IBinder onBind(Intent intent) { return null; } public static void start(Context context) { Intent service = new Intent(context, PushService.class); context.startService(service); } @Override public void onCreate() { mManager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE); receiver = new RefreshReceiver(); IntentFilter filter = new IntentFilter(ACTION_REFRESH); registerReceiver(receiver, filter); } @Override public void onDestroy() { if (mAManager != null) { Intent i = new Intent(ACTION_REFRESH); PendingIntent pendingIntent = PendingIntent.getBroadcast(this, 0, i, PendingIntent.FLAG_UPDATE_CURRENT); mAManager.cancel(pendingIntent); mAManager = null; } if (receiver != null) { unregisterReceiver(receiver); receiver = null; } } @Override public int onStartCommand(Intent intent, int flags, int startId) { if (AcApp.isMentionEnabled() && AcApp.getUser() != null) { mAManager = (AlarmManager) getSystemService(ALARM_SERVICE); Intent i = new Intent(ACTION_REFRESH); PendingIntent pendingIntent = PendingIntent.getBroadcast(this, 0, i, PendingIntent.FLAG_UPDATE_CURRENT); long interval = AcApp.getPreferenceRefreshingInterval(); long triggerAtTime = SystemClock.elapsedRealtime() + interval; mAManager.setRepeating(AlarmManager.ELAPSED_REALTIME, triggerAtTime, interval, pendingIntent); if (BuildConfig.DEBUG) Log.i("PUSH", "start : id=" + startId + ", interval=" + interval); } else { // ?? stopSelf(); } return super.onStartCommand(intent, flags, startId); } class RefreshReceiver extends BroadcastReceiver { @Override public void onReceive(Context context, Intent intent) { boolean canRefresh; if (AcApp.isMentionWifiOnly()) canRefresh = Connectivity.isWifiConnected(context); else canRefresh = Connectivity.isNetworkAvailable(context); if (canRefresh) try { if (ACTION_REFRESH.equals(intent.getAction())) { if (BuildConfig.DEBUG) Log.i("RefreshReceiver", "request refresh"); Cookie[] cookies = JSON.parseObject(AcApp.getUser().cookies, Cookie[].class); MentionsRequest mentionsRequest = new MentionActivity.MentionsRequest(1, cookies, mListener, mError); // ?? Activity ??? mentionsRequest.setShouldCache(true); byte[] data = AcApp.getDataInDiskCache(mentionsRequest.getCacheKey()); if (data != null) { String json = new String(data, Charset.defaultCharset()); JSONObject parseObject = JSON.parseObject(json); Mentions comments = JSON.toJavaObject(parseObject, Mentions.class); lastTotalCount = comments.totalCount; } AcApp.addRequest(mentionsRequest); } } catch (Exception e) { e.printStackTrace(); } else if (BuildConfig.DEBUG) { Log.d("PUSH", "no net work conn"); } } } Listener<Mentions> mListener = new Listener<Mentions>() { @Override public void onResponse(Mentions response) { boolean needNotify = response.totalCount > 0 && lastTotalCount < response.totalCount; if (BuildConfig.DEBUG) needNotify = true; if (needNotify) { Comment c = response.commentArr.get(response.commentList[0]); if (c != null) showNotification(c); } } }; ErrorListener mError = new ErrorListener() { @Override public void onErrorResponse(VolleyError error) { Log.e("PUSH", "something error", error); } }; private AlarmManager mAManager; private void showNotification(Comment c) { Intent i = new Intent(this, MentionActivity.class); PendingIntent pendingIntent = PendingIntent.getActivity(this, 0, i, Intent.FLAG_ACTIVITY_NEW_TASK); Notification noti = new NotificationCompat.Builder(this).setContentTitle(c.userName + "??") .setContentText(c.content).setWhen(System.currentTimeMillis()).setAutoCancel(true) .setDefaults(Notification.DEFAULT_ALL).setContentIntent(pendingIntent) .setSmallIcon(R.drawable.notify_chat).build(); mManager.notify(0, noti); } }